PC87591L datasheet(327/437 Pages) NSC

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Host Controller Interface Modules (Continued)

Revision 1.07

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Wake-Up Event Routing to SMI Enable Register 0 (WK_SMIEN0)

This register is set to 0016 on VPP power-up or Host Domain software reset. It controls the routing of detected wake-up

events to the SMI signal. Detected wake-up events that are enabled activate the SMI signal regardless of the value of

WK_EN0 register.

Location: Bank 2, Offset 1316

Type: R/W

S3 (Request to Change to S3 State). A write of 1 to this bit indicates to the core that the host requests to

change to S3 state. The S state and transition are interpreted, as speciﬁed in the ACPI standard for S state

change requests. This bit always reads back 0.

0: Not an S3 state request

1: S3 state setting request

S4 (Request to Change to S4 State). A write of 1 to this bit indicates to the core that the host requests to

change to S4 state. The S state and transition are interpreted, as speciﬁed in the ACPI standard for S state

change requests. This bit always reads back 0.

0: Not an S4 state request

1: S4 state setting request

S5 (Request to Change to S5 State). A write of 1 to this bit indicates to the core that the host requests to

change to S5 state. The S state and transition are interpreted, as speciﬁed in the ACPI standard for S state

change requests. This bit always reads back 0.

0: Not an S5 state request

1: S5 state setting request

7-6

Reserved.

Bit

76543210

Name

Reserved

Software

Event to

SMI Enable

Reserved

RING

Event to

SMI Enable

Reserved

RI2

Event to

SMI Enable

RI1

Event to

SMI Enable

Reset

00000000

Bit

Description

RI1 Event to SMI Enable.

0: Disabled (default)

1: Enabled

RI2 Event to SMI Enable.

0: Disabled (default)

1: Enabled

Reserved.

RING Event to SMI Enable.

0: Disabled (default)

1: Enabled

5-4

Reserved.

Software Event to SMI Enable.

0: Disabled (default)

1: Enabled

Reserved.

PC87591L Datasheet(PDF) 327 Page - National Semiconductor (TI)

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